CVE-2016-7942
The XGetImage function in X.org libX11 before 1.6.4 might allow remote X servers to gain privileges via vectors involving image type and geometry, which triggers out-of-bounds read operations.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The XGetImage function in X.org libX11 before 1.6.4 might allow remote X servers to gain privileges via vectors involving image type and geometry, which triggers out-of-bounds read operations.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 4.46% probability · 91th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-264, CWE-787
- Affected
- fedoraproject/fedora · x.org/libx11
- Source
- security@opentext.com
EPSS 4.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.openwall.com/lists/oss-security/2016/10/04/2
- http://www.openwall.com/lists/oss-security/2016/10/04/4
- http://www.securityfocus.com/bid/93363
- http://www.securitytracker.com/id/1036945
- https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=8ea762f94f4c942d898fdeb590a1630c83235c17
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMCVDXMFPXR7QGMKDG22WPPJCXH2X3L7/
- https://lists.x.org/archives/xorg-announce/2016-October/002720.html
- https://security.gentoo.org/glsa/201704-03
- https://usn.ubuntu.com/3758-1/
- https://usn.ubuntu.com/3758-2/
- http://www.openwall.com/lists/oss-security/2016/10/04/2
- http://www.openwall.com/lists/oss-security/2016/10/04/4
- http://www.securityfocus.com/bid/93363
- http://www.securitytracker.com/id/1036945
- https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=8ea762f94f4c942d898fdeb590a1630c83235c17
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMCVDXMFPXR7QGMKDG22WPPJCXH2X3L7/
- https://lists.x.org/archives/xorg-announce/2016-October/002720.html
- https://security.gentoo.org/glsa/201704-03
- https://usn.ubuntu.com/3758-1/
- https://usn.ubuntu.com/3758-2/
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.